StandOffs & Screws
Standoffs
M2.5 x 16mm Female Female Hex Brass Standoff Spacers (FF M2.5 x 16 Brass)
These are suitable for DIY projects or Raspberry Pi pcb as the outside diameter is only 2.5mm that fits in the Pi mounting holes
Nylon Slotted screws and spacers M4 x 16 (4 pack) (Nylon M4x16 4pack)
Pic is for illustration purposes only